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https://github.com/edk2-porting/linux-next.git
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c673a2b400
Commit 21f2aae91e902aad ("leds: leds-gpio: Add support for GPIO
descriptors") already converted most of the driver to use GPIO descriptors.
What is still missing is the platform specific hook gpio_blink_set() and
board files which pass legacy GPIO numbers to this driver in platform data.
In this patch we handle the former and convert gpio_blink_set() to take
GPIO descriptor instead. In order to do this we convert the existing four
users to accept GPIO descriptor and translate it to legacy GPIO number in
the platform code. This effectively "pushes" legacy GPIO number usage from
the driver to platforms.
Also add comment to the remaining block describing that it is legacy code
path and we are getting rid of it eventually.
Suggested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/*
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* arch/arm/mach-s3c2410/h1940-bluetooth.c
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* Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org>
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive for
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* more details.
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*
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* S3C2410 bluetooth "driver"
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/delay.h>
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#include <linux/string.h>
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#include <linux/ctype.h>
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#include <linux/leds.h>
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#include <linux/gpio.h>
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#include <linux/rfkill.h>
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#include <plat/gpio-cfg.h>
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#include <mach/hardware.h>
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#include <mach/regs-gpio.h>
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#include <mach/gpio-samsung.h>
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#include "h1940.h"
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#define DRV_NAME "h1940-bt"
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/* Bluetooth control */
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static void h1940bt_enable(int on)
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{
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if (on) {
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/* Power on the chip */
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gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 1);
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/* Reset the chip */
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 1);
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 0);
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h1940_led_blink_set(NULL, GPIO_LED_BLINK, NULL, NULL);
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}
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else {
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gpio_set_value(S3C2410_GPH(1), 1);
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mdelay(10);
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gpio_set_value(S3C2410_GPH(1), 0);
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mdelay(10);
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gpio_set_value(H1940_LATCH_BLUETOOTH_POWER, 0);
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h1940_led_blink_set(NULL, GPIO_LED_NO_BLINK_LOW, NULL, NULL);
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}
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}
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static int h1940bt_set_block(void *data, bool blocked)
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{
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h1940bt_enable(!blocked);
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return 0;
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}
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static const struct rfkill_ops h1940bt_rfkill_ops = {
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.set_block = h1940bt_set_block,
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};
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static int h1940bt_probe(struct platform_device *pdev)
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{
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struct rfkill *rfk;
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int ret = 0;
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ret = gpio_request(S3C2410_GPH(1), dev_name(&pdev->dev));
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if (ret) {
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dev_err(&pdev->dev, "could not get GPH1\n");
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return ret;
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}
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ret = gpio_request(H1940_LATCH_BLUETOOTH_POWER, dev_name(&pdev->dev));
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if (ret) {
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gpio_free(S3C2410_GPH(1));
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dev_err(&pdev->dev, "could not get BT_POWER\n");
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return ret;
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}
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/* Configures BT serial port GPIOs */
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s3c_gpio_cfgpin(S3C2410_GPH(0), S3C2410_GPH0_nCTS0);
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s3c_gpio_setpull(S3C2410_GPH(0), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(1), S3C2410_GPIO_OUTPUT);
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s3c_gpio_setpull(S3C2410_GPH(1), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(2), S3C2410_GPH2_TXD0);
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s3c_gpio_setpull(S3C2410_GPH(2), S3C_GPIO_PULL_NONE);
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s3c_gpio_cfgpin(S3C2410_GPH(3), S3C2410_GPH3_RXD0);
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s3c_gpio_setpull(S3C2410_GPH(3), S3C_GPIO_PULL_NONE);
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rfk = rfkill_alloc(DRV_NAME, &pdev->dev, RFKILL_TYPE_BLUETOOTH,
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&h1940bt_rfkill_ops, NULL);
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if (!rfk) {
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ret = -ENOMEM;
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goto err_rfk_alloc;
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}
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ret = rfkill_register(rfk);
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if (ret)
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goto err_rfkill;
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platform_set_drvdata(pdev, rfk);
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return 0;
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err_rfkill:
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rfkill_destroy(rfk);
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err_rfk_alloc:
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return ret;
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}
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static int h1940bt_remove(struct platform_device *pdev)
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{
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struct rfkill *rfk = platform_get_drvdata(pdev);
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platform_set_drvdata(pdev, NULL);
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gpio_free(S3C2410_GPH(1));
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if (rfk) {
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rfkill_unregister(rfk);
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rfkill_destroy(rfk);
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}
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rfk = NULL;
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h1940bt_enable(0);
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return 0;
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}
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static struct platform_driver h1940bt_driver = {
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.driver = {
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.name = DRV_NAME,
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},
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.probe = h1940bt_probe,
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.remove = h1940bt_remove,
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};
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module_platform_driver(h1940bt_driver);
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MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
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MODULE_DESCRIPTION("Driver for the iPAQ H1940 bluetooth chip");
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MODULE_LICENSE("GPL");
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